Turbine-bucket



` UNITED sTATEs PATENT oEEioE,

JAMES LEONARD MOORE, F WELLSVILLE, NEW YORK, ASSIGNOR T0 THEKERR TURBINE COMPANY,OF WELLSVIILE, NEW YORK, A. CORPORATION O F NEW TURBINE-BUCKET.

Specification of Letters latent. Patented May 27, 1919,

Application led I une 16, 1916. Serial No. 104,065.

To all whom t mag/concern.'

Be it known that I, JAMES LEONARD MOORE,

` of Wellsville, in the county of Allegany shank 6 the bucket is provided with a flange and in the State of New York, have invented a certain new and useful Improvement in Turbine-Buckets, and do hereby declare that thefollowing is a full, clear, and exact description thereof. v

My invention relates particularly to buckets designed to be attached to turbine wheels driven by steam or some other elastic Huid.

. The object of my invention is to provide a turbine bucket so. constructed that it conlines the 'et of steam to the bucket so as to prevent t e movement of the steam longitudinally c withv regard to the bucket, the

parts being Iso constructed, however, as to prevent lateral strains in the portions of the bucket located at the outer 'ends thereof, andl so that the strains are entirely radial in the buckets. A further object of my invention is to construct each of the buckets of such a shape that it will not only provide the necessary surface forrreceiving the force exerted by the steam, but also confine the steam to the said surface and -prevent the move-l ment of the steam longitudinally of the bucket while acting thereon. Further objects of my invention will appear from a detailed description thereof appearing hereinafter. v

While my invention is capable of embodiment in many di'erent forms for the purpose of illustration I shall s ow only one form thereof in the accompanying drawings, in which,

igure 1 is a perspective view of a bucket made in accordance with my invention;

Fig. 2 is a side elevation partly in section of a bucket wheel provided with buckets of this kind; i

Fig. 3 is aplan view of the same.; and Fig. 4 is la transverse section of a bucket wheel such as that shown in Figs. 2 and 3.

-In the drawings I have shown a bucket wheel l1 having a plurality of recesses '2, comprisin a transversely. directed cylindrical portlon 3 and a similarly dlrected rectangular .portion 4. In each of the recesses 2 there is supported a bucket 5 preferably Y above in-fdetail, I wish it to be understood made of a drop forging in a-single piece of metal. Each of the buckets 5 comprises a shank 6 having a cylindrical portion 7 and a fiat portion 8 adaptedto .lit in one of the recesses 2 and be riveted therein. Above the 9 which rests against the louter rim of the i bucket wheel 1, and above the ange 9 there cave forward surface 10 and a convex rear surfacc 11. On the outer end of the bucket there 1s a flange 12 having on its forward lface a recess 13 with sides 14 forming obtuse is a main body portion provided with a con- 13, are inserted sidewise into the recesses 2 in the bucket wheel l. When they have reached the correct position in said recesses the ends of the bucketshanks 3 and 4 are riveted over upon the chamfered edge 4 of the recesses thereby securely fastening the buckets. in place. Not only are the individual buckets fastened bythe riveting of the particular shanks attached thereto, but the engagement of the buckets one with -another by 'means of the projections 17 and the recesses 13 enables the riveting of the shank of anyone of the buckets to assist in holding the other buckets in place. The passage of steam over the faces of the buckets drives the. bucket wheel v1, while,.`at the same time,

Ythe tendency of the steam to escape from the bucket in a radial direction is prevented owing to the presence of the ilanges 12. The construction 1s such, furthermore, that no lateral strains in the anges 12, that is to say, in the direction of the periphery of the wheel 1, can take place, but the strains on Said ianges are purely radial. This eliminates expense due to the repair of broken l shroud rings such as those previously used for preventing the movement of the steam in a radial direction while impinging upon the buckets. Furthermore, the fact that each v individual bucketv is made in a single integral piece of metal gives it strength. andA obviates the repairs that would be necessary `when usin a number of different parts. While have described my invention that many changes may be made' .thereinv without departing from the spirit thereof.

I claim:

1. A turbinebucket having a transverse .flange on theouter end thereof, s aid ange extending both forwardly and rearwardly of l the body of the bucket, one of said extending portions being provided with a projection intermediate its sides, and the other extending portion having a recess complementary flange on the outer end thereof, said flange'- being formed with a straight-sided projection on one side and a complementary recess in the intermediate portion of the other side, whereby the projection of one bucket engages the recess of the adjacent bucket.

3. A turbine bucket having a transverse I flange on the outer end thereof, said flange being formed with a straight-sided projection on one side and a complementary recess in the intermediate side.

4. A turbine bucket having a transverse Harige on the outer end thereof, said flange being formed with a straight-sided projection on one side and a complementary recess in the intermediate portion of the other side, said recess overlyin the body of the bucket.

5. A turbine buoet having a transverse flange on the outer end thereof said flange being formed ith a straight-sided tapering projection on one side and a complementary recess in the .intermediate portion of the other side.

ln testimonythat I claim the foregoing l have hereunto set my hand.

JAMES LEONARD MOORE.

portion of the other 

